Unit 2 vocabulary

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Across
  1. 8. the brightness of a star as seen from Earth
  2. 9. Small planetary objects that form through the action of gravity during the birth of a solar system
  3. 12. the distance light travels in one year
  4. 15. Outermost layer of the suns interior, where hot gas moves up toward the surface and cooler gas moves deeper into the interior
  5. 17. Chunks of rock or dust from space
  6. 22. Visible surface of the sun; innermost layer of the sun's atmosphere (Light)
  7. 23. A unit of length used for distances within the solar system
  8. 27. A huge group of single stars, star systems, star clusters, dust, and gas bound together by gravity
  9. 28. A contracting cloud of gas and dust with enough mass to form a star
  10. 29. the zone of the sun's interior that is between the core and the convective zone and in which energy moves by radiation
Down
  1. 1. The outermost layer of the sun's atmosphere
  2. 2. The sun &all of the planets and other bodies that travel around it
  3. 3. the brightness a star would have if it were at a standard distance from earth
  4. 4. An object that orbits a star, is large enough to have become rounded by its own gravity, and has cleared the area of its orbit.
  5. 5. The blue-white hot core of a star that is left behind after its outer layers have expanded and drifted out into space
  6. 6. Any of numerous small celestial bodies composed of rock and metal that move around the sun (mainly between the orbits of Mars and Jupiter)
  7. 7. A stream of electrically charged particles that emanate from the sun's corona.
  8. 10. The middle layer of the sun's atmosphere
  9. 11. Reddish loops of gas that link different parts of sunspot regions
  10. 13. All of space and everything in it
  11. 14. A large cloud of dust and gas in space
  12. 16. Innermost layer of the sun
  13. 18. Violent eruptions of particles and radiation from the surface of the Sun
  14. 19. A ball of frozen dust and rock that orbits the sun and has a tail that glows
  15. 20. A typical star that is the source of light and heat for the planets in the solar system.
  16. 21. The initial explosion that resulted in the formation and expansion of the universe
  17. 24. A dark area of gas/plasm on the sun's surface that is cooler than surrounding gases.
  18. 25. A natural satellite that revolves around a planet.
  19. 26. A gigantic explosion in which a massive star collapses and throws its outer layers into space